Characterization of Mechanical Properties and the Abrasive Wear of Thermal Spray Coatings

Abstract

Thermal spray is a generic term used to define a group of coating processes used to apply both metallic and non-metallic coatings. These coatings are usually defined by their hardness, strength, porosity, roughness, and wear resistance. In this chapter, the authors turn their attention to the mechanical and tribological properties of thermal spray coatings. The individual phase plays a very important role in determining the performance of the coating. However, evaluating the mechanical and tribological properties at a nano-level requires new test methods and their validation. In this chapter, elaborate discussion of some techniques to evaluate and analyze the mechanical and tribological properties of different thermal spray coatings is done. This chapter is intended to help the reader to firstly understand the basic principle and methods of characterization of thermal spray coatings using instrumented nanoindentation, nanoscratch, abrasive wear testing techniques, and secondly to get an idea of the recent techniques and review the research and development in the same field.

Fatigue behaviour of Plasma Sprayed Titania and Chromia Coatings

“…Although the fourth and fifth chromia imprints indicated that the specimens are characterized by higher resistance than the titania coatings. Taking into consideration the first four specimens from each category, the titania coated specimens exhibit higher strength against the indentation loads [26]. Fig.…”

Surface characteristics of titanium dental implants with improved microdesigns: An in vivo study of their osseointegration performance in goat mandible

“…Moreover, the value of critical load is insufficient to predict nature of bond strength and the mechanism of coating failure. 26 Therefore, the pull-off test would be the more authentic method to assess bond strength compared to scratch test considering the bio-mechanical forces applied on implants in vivo.…”